The Ex barrier is included in the scope of delivery of the CD 6 sensors in Ex ia version. It is meant for wall mounting close to the location of the LDS 6 central unit within an Ex-safe environment.

The Ex barrier defines the interface between the analyzer central unit and the intrinsically-safe sensor heads and ensures under all circumstances that the total electrical energy transferred via the hybrid cable to the sensors is always less than that needed to ignite combustible gas mixtures.